(19)

(11)

EP 2 536 989 A2

(12)

(88) Date of publication A3: 01.12.2011 (43) Date of publication: 26.12.2012 Bulletin 2012/52 (21) Application number: 11745439.7 (22) Date of filing: 22.02.2011

(51) International Patent Classification (IPC):  F28D 1/04(2006.01) F28F 1/22(2006.01) F28F 1/20(2006.01) F28F 1/10(2006.01) (86) International application number: PCT/US2011/025728 (87) International publication number: WO 2011/103574 (25.08.2011 Gazette 2011/34)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 19.02.2010 US 306140 P (71) Applicant: Blissfield Manufacturing Company Blissfield, MI 49228 (US)	(72) Inventor: SCHAEFER, Jack Lambertville Michigan 48144 (US) (74) Representative: Turnbull, Alexander James et al avidity IP Merlin House Falconry Court Baker's Lane Epping, Essex CM16 5DQ Epping, Essex CM16 5DQ (GB)